2042643 has 4 divisors (see below), whose sum is σ = 2723528. Its totient is φ = 1361760.

The previous prime is 2042627. The next prime is 2042647. The reversal of 2042643 is 3462402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2042643 - 2⁴ = 2042627 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 0 + 4⁴ + 2¹⁷ + 6⁶ + 4⁹ + 3¹³ .

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2042647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340438 + ... + 340443.

It is an arithmetic number, because the mean of its divisors is an integer number (680882).

2^2042643 is an apocalyptic number.

2042643 is a deficient number, since it is larger than the sum of its proper divisors (680885).

2042643 is an equidigital number, since it uses as much as digits as its factorization.

2042643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680884.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 2042643 is about 1429.2106212871. The cubic root of 2042643 is about 126.8812621174.

The spelling of 2042643 in words is "two million, forty-two thousand, six hundred forty-three".